CLI: Enhance CLI to support "migration" via rsync/stunnel

[JohnStrunk]

Describe the feature you'd like to have.
The migration set of CLI sub-commands are designed to allow migrating data into a PVC from a local file system. It accomplishes this by mimicking the actions of a replication source and transferring data into a ReplicationDestination that is in-cluster. This is currently done using the rsync/ssh data mover since both the rsync and ssh client are typically available on the source system.

The migration command needs to be converted to the new rsync/stunnel mover (#364) since the existing ssh-based one will be deprecated and removed.

What is the value to the end user? (why is it a priority?)
Being able to migrate data from an external system into a PVC is important for users that want to containerize their applications

How will we know we have a good solution? (acceptance criteria)

• The migration sub-commands will provide the existing functionality using the new mover
• The CLI should provide the option to use elevated permissions on the destination cluster in order to preserve file metadata
  • Elevated permissions should not be the default, nor required

Additional context

• Depends on Create a new rsync-based mover that uses stunnel w/ PSK instead of ssh #364